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EMPIRICAL: Based on or relating to real world data or analysis. Empirical should be contrasted with the theoretical. Whereas theoretical refers to abstract representations, empirical is actual real world observations. Empirical observation is critical to the scientific method. Once an hypothesis implied by a theory, empirical observation is key to the verification process.

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OLIGOPOLY, CONCENTRATION

Oligopoly is a market structure that contains a small number of relatively large firms, meaning oligopoly markets tend to be concentrated. A small number of large firms account for a majority of total output. Concentration unto itself is not necessarily bad, but it often leads to inefficient behavior, such as collusion and nonprice competition. Concentration is measured in three ways--market share, concentration ratio, Herfindahl index.

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Today, you are likely to spend a great deal of time at a flea market looking to buy either a three-hole paper punch or decorative picture frames. Be on the lookout for cardboard boxes.
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The portion of aggregate output U.S. citizens pay in taxes (30%) is less than the other six leading industrialized nations -- Britain, Canada, France, Germany, Italy, or Japan.
"We must be willing to let go of the life we have planned, so as to have the life that is waiting for us. "

-- E. M. Forster, writer

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